vigilant - adj. carefully observant or attentive; on the lookout for possible danger; open-eyed awareness
The Vigilant brand of alarms has been around since the 1960's, when a rudimentary form of a Vigilant branded home burglar alarm was imported by the Woolworth corporation. The 1960's devices required you to attach a string to your door, and if someone opened the door it pulled the string which in turn pulled the pin. Our offices in Minneapolis are adorned with a museum of these early devices as a reminder of not only the heritage of the brand (since 1968!) but of the fact that vigilance and personal security is timeless and universal.